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Finding the Fourth Proportional to 303,311.21, 455,020.29 and 103,584.78

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Solution

The fourth proportional to 303,311.21, 455,020.29 and 103,584.78 is: 155,395.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,311.21 : 455,020.29 = 103,584.78 : x
  2. Step 2: Convert to fraction form
    303,311.21/455,020.29 = 103,584.78/x
  3. Step 3: Cross multiply
    303,311.21x = 455,020.29 × 103,584.78
  4. Step 4: Simplify right side
    303,311.21x = 47,133,176,635.19
  5. Step 5: Solve for x
    x = 47,133,176,635.19/303,311.21
  6. Step 6: Final answer
    x = 155,395.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.